<template>
  <div>
    <el-card class="box-card">
      <div slot="header" class="clearfix">
        <span>文章列表</span>
      </div>
      <!-- 搜索区域 -->
      <div class="search-box">
        <el-form :inline="true" :model="q">
          <el-form-item label="文章分类">
            <el-select
              v-model="q.cate_id"
              placeholder="请选择分类"
              size="small"
            >
              <el-option
                v-for="item in cateList"
                :key="item.id"
                :label="item.cate_name"
                :value="item.id"
              ></el-option>
            </el-select>
          </el-form-item>
          <el-form-item label="发布状态" style="margin-left: 15px">
            <el-select v-model="q.state" placeholder="请选择状态" size="small">
              <el-option label="已发布" value="已发布"></el-option>
              <el-option label="草稿" value="草稿"></el-option>
            </el-select>
          </el-form-item>
          <el-form-item>
            <el-button type="primary" size="small" @click="initArtList"
              >筛选</el-button
            >
            <el-button type="info" size="small" @click="resetList"
              >重置</el-button
            >
          </el-form-item>
        </el-form>
        <!-- 发表文章的按钮 -->
        <el-button
          type="primary"
          size="small"
          class="btn-pub"
          @click="showPubDialog"
          >发表文章</el-button
        >
      </div>
      <!-- 文章表格区域 -->
      <el-table :data="artList" style="width: 100%" border stripe>
        <el-table-column label="文章标题" prop="title">
          <template v-slot="{row}">
            <el-link type="primary" @click="showDetail(row.id)">{{row.title}}</el-link>
          </template>
        </el-table-column>
        <el-table-column label="分类" prop="cate_name"></el-table-column>
        <el-table-column label="发表时间" prop="pub_date">
          <template v-slot="{ row }">
            {{ row.pub_date | dateFormat }}
          </template>
        </el-table-column>
        <el-table-column label="状态" prop="state"></el-table-column>
        <el-table-column label="操作">
          <template v-slot="{row}">
          <el-button type="danger" size="mini" @click="remove(row.id)">删除</el-button>
          </template>
        </el-table-column>
      </el-table>
      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="q.pagenum"
        :page-sizes="[2, 3, 5, 10]"
        :page-size="q.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>
      <el-dialog
        title="发表文章"
        :visible.sync="pubDialogVisible"
        fullscreen
        @closed="onDialogClosed"
      >
        <!-- :before-close="handleClose" -->
        <!-- 发布文章的对话框 -->
        <el-form
          :model="pubForm"
          :rules="pubFormRules"
          ref="pubFormRef"
          label-width="100px"
        >
          <el-form-item label="文章标题" prop="title">
            <el-input
              v-model="pubForm.title"
              placeholder="请输入标题"
            ></el-input>
          </el-form-item>
          <el-form-item label="文章分类" prop="cate_id">
            <el-select
              v-model="pubForm.cate_id"
              placeholder="请选择分类"
              style="width: 100%"
            >
              <el-option
                :label="item.cate_name"
                :value="item.id"
                v-for="item in cateList"
                :key="item.id"
              ></el-option>
            </el-select>
          </el-form-item>
          <el-form-item label="文章内容" prop="content">
            <!-- 使用 v-model 进行双向的数据绑定 -->
            <quill-editor v-model="pubForm.content"></quill-editor>
          </el-form-item>
          <el-form-item label="文章封面" prop="cover_img">
            <!-- 用来显示封面的图片 -->
            <img :src="preview" alt="" class="cover-img" ref="imgRef" />
            <br />
            <!-- 文件选择框，默认被隐藏 -->
            <input
              type="file"
              style="display: none"
              accept="image/*"
              ref="iptFile"
              @change="onCoverChange"
            />
            <!-- 选择封面的按钮 -->
            <el-button type="text" @click="chooseImg">+ 选择封面</el-button>
          </el-form-item>
          <el-form-item prop="state">
            <el-button type="primary" @click="postArticle('已发布')"
              >发布</el-button
            >
            <el-button type="info" @click="postArticle('草稿')"
              >存为草稿</el-button
            >
          </el-form-item>
        </el-form>
      </el-dialog>
      <!-- 文章详情 -->
      <el-dialog
        title="文章预览"
        :visible.sync="TextdialogVisible"
        width="80%"
      >
        <h1 class="title">{{artDetail.title}}</h1>
        <div class="info">
          <span>作者: {{ artDetail.nickname ||  artDetail.username}}</span>
          <span>发布时间: {{artDetail.pub_date | dateFormat}}</span>
          <span>所属分类: {{artDetail.cate_name}}</span>
          <span>状态: {{artDetail.state}}</span>
        </div>
        <!-- 分割线 -->
        <img :src="'http://www.liulongbin.top:3008' + artDetail.cover_img" alt="">
        <div v-html="artDetail.content"></div>
      </el-dialog>
    </el-card>
  </div>
</template>

<script>
import coverimg from '../../../assets/images/cover.jpg'

export default {
  name: 'ArtList',
  data () {
    return {
      cateList: [],
      // 查询参数对象
      artList: [],
      artDetail: {},
      total: 0,
      q: {
        pagenum: 1,
        pagesize: 2,
        cate_id: '',
        state: ''
      },
      pubDialogVisible: false,
      TextdialogVisible: false,
      // 表单的数据对象
      pubForm: {
        title: '',
        cate_id: '',
        content: '',
        cover_img: null,
        state: ''
      },
      preview: coverimg,
      // 表单的验证规则对象
      pubFormRules: {
        title: [
          { required: true, message: '请输入文章标题', trigger: 'blur' },
          {
            min: 1,
            max: 30,
            message: '文章标题的长度为1-30个字符',
            trigger: 'blur'
          }
        ],
        cate_id: [
          { required: true, message: '请选择文章标题', trigger: 'blur' }
        ],
        content: [
          { required: true, message: '请填写文章内容', trigger: 'blur' }
        ],
        cover_img: [
          { required: true, message: '请选择文章封面', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    showPubDialog () {
      this.pubDialogVisible = true
    },
    async initCateList () {
      const { data: res } = await this.$http.get('/my/cate/list')
      if (res.code === 0) this.cateList = res.data
    },
    chooseImg () {
      this.$refs.iptFile.click()
    },
    onCoverChange (e) {
      // 获取用户选择的文件列表
      const files = e.target.files
      if (files.length === 0) {
        // 用户没有选择封面
        this.pubForm.cover_img = null
        this.preview = coverimg
      } else {
        // 用户选择了封面
        this.pubForm.cover_img = files[0]
        this.preview = URL.createObjectURL(files[0])
      }
    },
    postArticle (state) {
      this.$refs.pubFormRef.validate(async (valid) => {
        if (!valid) return
        this.pubForm.state = state
        const fd = new FormData()
        for (const k in this.pubForm) {
          fd.append(k, this.pubForm[k])
        }
        const { data: res } = await this.$http.post('/my/article/add', fd)
        console.log(res)
        if (res.code !== 0) return this.$message.error('发布文章失败!')
        this.$message.success('发布文章成功')
        this.pubDialogVisible = false
        this.initArtList()
      })
    },
    onDialogClosed () {
      this.$refs.pubFormRef.resetFields()
      this.preview = coverimg
    },
    // 初始化文章的列表数据
    async initArtList () {
      const { data: res } = await this.$http.get('/my/article/list', {
        params: this.q
      })
      if (res.code !== 0) return this.$message.error('获取文章列表失败!')
      this.artList = res.data
      this.total = res.total
    },
    handleSizeChange (newSize) {
      // 为 pagesize 赋值
      this.q.pagesize = newSize
      // 默认展示第一页数据
      this.pagenum = 1
      // 重新发起请求
      this.initArtList()
    },
    // 页码值发生了变化
    handleCurrentChange (newPage) {
      // 为页码值赋值
      this.q.pagenum = newPage
      // 重新发起请求
      this.initArtList()
    },
    // 重置文章的列表数据
    resetList () {
      // 1. 重置查询参数对象
      this.q = {
        pagenum: 1,
        pagesize: 2,
        cate_id: '',
        state: ''
      }
      // 2. 重新发起请求
      this.initArtList()
    },
    // 文章详情
    async showDetail (id) {
      const { data: res } = await this.$http.get('/my/article/info', { params: { id } })
      if (res.code !== 0) this.$message.error(res.message)
      this.artDetail = res.data
      this.TextdialogVisible = true
    },
    async remove (id) {
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(e => e)
      if (confirmResult === 'cancel') return
      const { data: res } = await this.$http.delete('/my/article/info', { params: { id } })
      if (res.code !== 0) this.$message.error(res.message)
      this.$message.success(res.message)

      // 如果在刷新数据之前,当前页的数据只有 1 条，
      // 而且，当前的页码值 > 1，
      // 则说明当前页已没有数据可显示，需要让页码值 -1
      if (this.artList.length === 1 && this.q.pagenum > 1) {
        this.q.pagenum--
      }
      this.initArtList()
    }
  },
  created () {
    this.initCateList()
    this.initArtList()
  }
}
</script>

<style lang="less" scoped>
.search-box {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  .btn-pub {
    margin-top: 5px;
  }
}
// 设置富文本编辑器的默认最小高度
/deep/ .ql-editor {
  min-height: 300px;
}
// 设置图片封面的宽高
.cover-img {
  width: 400px;
  height: 280px;
  object-fit: cover;
}
.title {
  font-size: 24px;
  text-align: center;
  font-weight: normal;
  color: #000;
  margin: 0 0 10px 0;
}

.info {
  font-size: 12px;
  span {
    margin-right: 20px;
  }
}
</style>
